public class Student {
    public String name;
    public String gender;
    public int age;
    public double score;

    public void DoClass(){}
    public void DoHomeword(){}
    public void Exam(){}

    public static void main(String[] args) {
        Student s1 = new Student("Li leilei","男",18,3.8);
        Student s2 = new Student("Han meimei","女",19,4.0);
        Student s3 = new Student("Jim","男",18,2.6);
    }
}
